It started few years ago when I wanted to build some device it started with a breadboard then it was time to shrink it
![](https://cdn.hackaday.io/images/9771311713530602621.jpg)
This thing is a giant leap, although it was really hard to work with this material
Now I tried building my own using a nail polish/marker and some chemical to etch the copper away
![](https://cdn.hackaday.io/images/6129231713530664326.jpg)
The result was ok but I couldn't reproduce easily and the main problem was the size of wire which with this 'technology' was about 2mm.
![](https://cdn.hackaday.io/images/8069931713536967707.jpg)
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